When Congress passes legislation and the President signs it into law, enforcement is placed into the hands of the appropriate Federal department. Bureaucrats within that department then develop the procedures and regulations that govern how the law is enforced. Depending on how tightly or loosely the legislation was written, the enforcers may have considerable discretion as to how they interpret the law and apply it. This gives unelected bureaucratic activists within certain federal agencies immense power.
Several states are now suing the Environmental Protection Agency because climate change activists in EPA are interpreting Federal laws in such a way as to virtually destroy the fossil fuel industry and wreck the economies of states like West Virginia and North Dakota. Was that what Congress intended and approved? The issue is now before the Supreme Court.
Protect us from bureaucratic tyranny!